ransomexx_win | f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1

Analysis

max time kernel
148s
max time network
174s
platform
windows7_x64
resource
win7v20210410
submitted
20-08-2021 16:22

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General

Target

f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
Size

156KB
MD5

c063c86931c662c1a962d08915d9f3a8
SHA1

fc9284b7a140c0d411ebd0eb4752e477d5d213fc
SHA256

f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1
SHA512

d90d80f0ad27d38e0e70079de3a090dfab41d07465be0031745fc60a3fd4303ea8b7e7b852a377838a4c159a65f9ed3fb2b49c4ba1f713fd1ddc09df77006b3e

Score

10^/10

ransomexx_win evasion ransomware

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\!TXDOT_READ_ME!.txt

Ransom Note

Greetings, Texas Department of Transportation! Read this message CAREFULLY and contact someone from IT department. Your files are securely ENCRYPTED. No third party decryption software EXISTS. MODIFICATION or RENAMING encrypted files may cause decryption failure. You can send us an encrypted file (not greater than 400KB) and we will decrypt it FOR FREE, so you have no doubts in possibility to restore all files from all affected systems ANY TIME. Encrypted file SHOULD NOT contain sensitive information (technical, backups, databases, large documents). The rest of data will be available after the PAYMENT. Infrastructure rebuild will cost you MUCH more. Contact us ONLY if you officially represent the whole affected network. The ONLY attachments we accept are non archived encrypted files for test decryption. Speak ENGLISH when contacting us. Mail us: [email protected] We kindly ask you not to use GMAIL, YAHOO or LIVE to contact us. The PRICE depends on how quickly you do it. �

Emails

[email protected]

Signatures

Deletes NTFS Change Journal 2 TTPs
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
ransomware

Inhibit System Recovery
T1490

Data Destruction
T1485
RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win
Clears Windows event logs 1 TTPs
evasion ransomware

Indicator Removal on Host
T1070

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
340	bcdedit.exe
980	bcdedit.exe

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command-Line Interface

T1059

File Deletion

T1107

Inhibit System Recovery

T1490

pid	Process
1840	wbadmin.exe

Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

Modifies extensions of user files 5 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\ClearRename.tif => C:\Users\Admin\Pictures\ClearRename.tif.txd0t	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
File renamed	C:\Users\Admin\Pictures\GrantSave.png => C:\Users\Admin\Pictures\GrantSave.png.txd0t	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
File renamed	C:\Users\Admin\Pictures\JoinEdit.png => C:\Users\Admin\Pictures\JoinEdit.png.txd0t	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
File renamed	C:\Users\Admin\Pictures\TestUnprotect.png => C:\Users\Admin\Pictures\TestUnprotect.png.txd0t	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
File renamed	C:\Users\Admin\Pictures\UnprotectPush.crw => C:\Users\Admin\Pictures\UnprotectPush.crw.txd0t	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe

Overwrites deleted data with Cipher tool 1 TTPs
Cipher is a Windows tool which be used to securely wipe deallocated HDD space, preventing recovery of deleted data.
ransomware

Inhibit System Recovery
T1490

Enumerates connected drives 3 TTPs 1 IoCs

Attempts to read the root path of hard drives other than the default C: drive.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
File opened (read-only)	\??\D:	cipher.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeSecurityPrivilege	544	wevtutil.exe
Token: SeBackupPrivilege	544	wevtutil.exe
Token: SeSecurityPrivilege	680	wevtutil.exe
Token: SeBackupPrivilege	680	wevtutil.exe
Token: SeSecurityPrivilege	936	wevtutil.exe
Token: SeBackupPrivilege	936	wevtutil.exe
Token: SeSecurityPrivilege	1096	wevtutil.exe
Token: SeBackupPrivilege	1096	wevtutil.exe
Token: SeSecurityPrivilege	540	wevtutil.exe
Token: SeBackupPrivilege	540	wevtutil.exe
Token: SeBackupPrivilege	1728	wbengine.exe
Token: SeRestorePrivilege	1728	wbengine.exe
Token: SeSecurityPrivilege	1728	wbengine.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 1028 wrote to memory of 680	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	31
PID 1028 wrote to memory of 680	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	31
PID 1028 wrote to memory of 680	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	31
PID 1028 wrote to memory of 680	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	31
PID 1028 wrote to memory of 1840	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	54
PID 1028 wrote to memory of 1840	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	54
PID 1028 wrote to memory of 1840	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	54
PID 1028 wrote to memory of 1840	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	54
PID 1028 wrote to memory of 828	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	52
PID 1028 wrote to memory of 828	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	52
PID 1028 wrote to memory of 828	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	52
PID 1028 wrote to memory of 828	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	52
PID 1028 wrote to memory of 980	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	51
PID 1028 wrote to memory of 980	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	51
PID 1028 wrote to memory of 980	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	51
PID 1028 wrote to memory of 980	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	51
PID 1028 wrote to memory of 340	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	50
PID 1028 wrote to memory of 340	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	50
PID 1028 wrote to memory of 340	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	50
PID 1028 wrote to memory of 340	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	50
PID 1028 wrote to memory of 1140	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	53
PID 1028 wrote to memory of 1140	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	53
PID 1028 wrote to memory of 1140	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	53
PID 1028 wrote to memory of 1140	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	53
PID 1028 wrote to memory of 544	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	49
PID 1028 wrote to memory of 544	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	49
PID 1028 wrote to memory of 544	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	49
PID 1028 wrote to memory of 544	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	49
PID 1028 wrote to memory of 936	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	47
PID 1028 wrote to memory of 936	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	47
PID 1028 wrote to memory of 936	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	47
PID 1028 wrote to memory of 936	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	47
PID 1028 wrote to memory of 1096	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	48
PID 1028 wrote to memory of 1096	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	48
PID 1028 wrote to memory of 1096	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	48
PID 1028 wrote to memory of 1096	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	48
PID 1028 wrote to memory of 540	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	34
PID 1028 wrote to memory of 540	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	34
PID 1028 wrote to memory of 540	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	34
PID 1028 wrote to memory of 540	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	34
PID 1028 wrote to memory of 748	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	32
PID 1028 wrote to memory of 748	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	32
PID 1028 wrote to memory of 748	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	32
PID 1028 wrote to memory of 748	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	32
PID 1028 wrote to memory of 1784	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	36
PID 1028 wrote to memory of 1784	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	36
PID 1028 wrote to memory of 1784	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	36
PID 1028 wrote to memory of 1784	1028	f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe	36

C:\Users\Admin\AppData\Local\Temp\f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe
"C:\Users\Admin\AppData\Local\Temp\f543c477ba67afd4fb2ae111b22c8d596bf8e61e13a627f6a972fac4762a70c1.exe"
1⤵
- Modifies extensions of user files
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:1028
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:680
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  PID:748
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:540
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  PID:1784
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:936
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1096
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:544
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:340
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:980
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:828
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  PID:1140
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:1840

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1728

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1572

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:2040

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Command-Line Interface

T1059

Persistence

Privilege Escalation

Defense Evasion

File Deletion

T1107

Indicator Removal on Host

T1070

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

Replay Monitor

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Downloads

memory/544-75-0x000007FEFB991000-0x000007FEFB993000-memory.dmp

Filesize
8KB

Download
memory/1028-60-0x0000000075591000-0x0000000075593000-memory.dmp

Filesize
8KB

Download
memory/1028-61-0x0000000008620000-0x0000000008A2B000-memory.dmp

Filesize
4.0MB

Download